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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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 * 1.1 (the "License"); you may not use this file except in compliance with
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 * for the specific language governing rights and limitations under the
 * License.
 * The Original Code is the Netscape Portable Runtime (NSPR).
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
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** RCCondition - C++ wrapper around NSPR's PRCondVar
** Conditions have a notion of timeouts. A thread that waits on a condition
** will resume execution when the condition is notified OR when a specified
** interval of time has expired.
** Most applications don't adjust the timeouts on conditions. The literature
** would argue that all threads waiting on a single condition must have the
** same semantics. But if an application wishes to modify the timeout with
** (perhaps) each wait call, that modification should be done consistantly
** and under protection of the condition's associated lock.
** The default timeout is infinity.

#if defined(_RCCOND_H)
#define _RCCOND_H

#include "rclock.h"
#include "rcbase.h"
#include "rcinrval.h"

struct PRCondVar;

class PR_IMPLEMENT(RCCondition): public RCBase
    RCCondition(RCLock*);           /* associates CV with a lock and infinite tmo */
    virtual ~RCCondition();

    virtual PRStatus Wait();        /* applies object's current timeout */

    virtual PRStatus Notify();      /* perhaps ready one thread */
    virtual PRStatus Broadcast();   /* perhaps ready many threads */

    virtual PRStatus SetTimeout(const RCInterval&);
                                    /* set object's current timeout value */

    PRCondVar *cv;
    RCInterval timeout;

    RCCondition(const RCCondition&);
    void operator=(const RCCondition&);

    RCInterval GetTimeout() const;
};  /* RCCondition */

inline RCCondition::RCCondition(): RCBase() { }
inline RCCondition::RCCondition(const RCCondition&): RCBase() { }
inline void RCCondition::operator=(const RCCondition&) { }

#endif /* defined(_RCCOND_H) */

/* RCCond.h */

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